13 Disposal
Installer reference guide
81
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1 – 2015.01
Error code
Detailed error
code
Description
89
03
Heat exchanger frozen.
AJ
03
Too long DHW heat-up time
required.
UA
17
Tank type problem
INFORMATION
In case of error code AH and no interruption of the
disinfection function occurred due to domestic hot water
tapping, following actions are recommended:
▪ When the Domestic hot water > Type > Reheat or
Reheat + sched. is selected, it is recommended to
program the start-up of the disinfection function at least
4 hours later than the last expected large hot water
tapping. This start-up can be set by installer settings
(disinfection function).
▪ When the Domestic hot water > Type > Scheduled only
is selected, it is recommended to program a Storage
eco 3 hours before the scheduled start-up of the
disinfection function to preheat the tank.
NOTICE
When the minimum water flow (in relation to the applicable
operation mode) is lower than described in the table below,
the unit will stop operation and the user interface will
display error 7H.
Minimum required flow during heat pump operation
04 models
Heating
6 l/min
Cooling
6 l/min
08 models
Heating
6 l/min
Cooling
10 l/min
11 models
Heating
10 l/min
Cooling
15 l/min
16 models
Heating
10 l/min
Cooling
15 l/min
Minimum required flow during defrost operation
04+08 models
12 l/min
11+16 models
15 l/min
Minimum required flow during backup heater operation
All models
12 l/min
INFORMATION
Error AJ-03 is reset automatically from the moment there is
a normal tank heat-up.
13
Disposal
13.1
Overview: Disposal
Typical workflow
Disposing of the system typically consists of the following stages:
1
Pumping down the system.
2
Dismantling the system according to the applicable legislation.
3
Treating the refrigerant, oil and other parts according to the
applicable legislation.
INFORMATION
For more details, see the service manual.
13.2
To pump down
Example:
To protect the environment, pump down when relocating
the unit or when disposing of the unit.
NOTICE
During pump down operation, stop the compressor before
removing the refrigerant piping. If the compressor is still
running and the stop valve is open during pump down, air
will be sucked into the system. Compressor breakage and
other injury will be the result due to abnormal pressure in
the refrigerant cycle.
Pump down operation will extract all refrigerant from the system into
the outdoor unit.
1
Remove the valve lid from liquid stop valve and gas stop valve.
2
Carry out the forced cooling operation.
3
After 5 to 10 minutes (after only 1 or 2 minutes in case of very
low ambient temperatures (<−10°C)), close the liquid stop valve
with a hexagonal wrench.
4
Check with the manifold if the vacuum is reached.
5
After 2-3 minutes, close the gas stop valve and stop forced
cooling operation.
a
c
b
d
d
e
a
Gas stop valve
b
Closing direction
c
Hexagonal wrench
d
Valve lid
e
Liquid stop valve
13.3
To start and stop forced cooling
Confirm that DIP switch SW2 is in COOL mode.
1
Press the forced cooling operation switch SW1 to begin forced
cooling.
2
Press the forced cooling operation switch SW1 to stop forced
cooling.
